diff options
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/stm32-dfsdm-adc.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index dc911b6fedd6..b28a716a23b2 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -771,7 +771,7 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev, struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id]; struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel]; - unsigned int spi_freq = adc->spi_freq; + unsigned int spi_freq; int ret = -EINVAL; switch (mask) { @@ -785,8 +785,18 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_SAMP_FREQ: if (!val) return -EINVAL; - if (ch->src != DFSDM_CHANNEL_SPI_CLOCK_EXTERNAL) + + switch (ch->src) { + case DFSDM_CHANNEL_SPI_CLOCK_INTERNAL: spi_freq = adc->dfsdm->spi_master_freq; + break; + case DFSDM_CHANNEL_SPI_CLOCK_INTERNAL_DIV2_FALLING: + case DFSDM_CHANNEL_SPI_CLOCK_INTERNAL_DIV2_RISING: + spi_freq = adc->dfsdm->spi_master_freq / 2; + break; + default: + spi_freq = adc->spi_freq; + } if (spi_freq % val) dev_warn(&indio_dev->dev, |